Combined steam-gage and safety-valve.



J. N. ANGELL. COMBINED STEAM GAGE ANDSAPETY VALVE. APPLIOATION FILED 11110119, 1911.

1,044,001. Patented Nov. 12, 1912.

COLUMBIA FLANOGRAPH C0,,WASHXNGTON, D C.

JOHN NAPOLEON ANGELL, OF FORT PIERRE, SOUTH DAKOTA.

COMBINED STEAM-GAGE AND SAFETY-VALVE.

Specification of Letters Patent.

Application filed December 19, 1911.

Patented Nov. 12,1912.

Serial No. 666,762.

To all whom it may concern:

Be it known that I, J OHN NAPOLEON AN- GELL, a citizen of the United States, residing at Fort Pierre, in the county of Stanley and State of South Dakota, have invented new and useful Improvements in Combined Steam-Gages and Safety-Valves, of which the following is a specification.

The general object of the invent-ion is to simplify the construction of safety valves and steam gages, and to this end the invention consists in a combined safety valve and steam gage in which the indicator hand and outlet to the atmosphere are controlled by a single element, the latter in turn being operated directly by the steam.

Other objects will appear and be better understood from the following description taken in connection with the accompanying drawings, in which,

Figure l is a view of the device partly in side elevation and vertical section and also showing a sectional detail of a boiler and the device connected thereto. Fig. 2 is a detail horizontal section on the line 22 of Fig. 1. Fig. 3 is a View similar to Fig. 2 but on the line 3-3 of Fig. 1.

5 indicates the upper portion of a boiler to which there is connected an apertured plate 6 and through these parts there is screwed one end portion of a pipe 7 through which the steam passes into the hollow cylinder 8 which is connected to the other end of the pipe 7.

The steam entering the cylinder 8 presses on a piston or plunger 9 and moves the latter against the action of a spring 10 which is connected to the piston. The spring is adjusted, or in other words, its tension may be varied by turning the screw 12 which extends through a stufiing box 13 in the lower end of the cylinder 8 and has a skeleton portion lt through which the steam from the pipe 7 passes and which is connected by a swivel 15 to the spring 10. In the present instance the head 14: is shown as screw threaded and engaging with the threaded portion 16 in the cylinder so that when the screw 12 is turned, the distance between the head and piston 9 will be varied.

17 indicates an arcuate dial which is suitably secured to the upper end of the cylinder 8 and has bearings for the arbor 18 upon which is mounted the indicator hand 19 and a crank 20, which latter is connected to the piston 9 by means of the connecting rod 21 which extends through a stufling box 22 in the upper end of the cylinder. Thus, when the steam forces the piston upwardly the free end of the indicator hand will be moved to that division on the dial which represents the number of pounds pressure in the boiler.

The outlettube 23 is arranged so that when the piston moves upwardly sufficiently far to move the indicator hand to the division on the dial which represents the maximum steam pressure required in the boiler, communication between the atmosphere and other portion of the cylinder now below the piston will be established, whereby, the steam from the boiler will pass directly into the atmosphere until the pressure is reduced sufiiciently to admit of the piston descending below the outlet 23.

The brace 24 which connects with the cou plings 25 and 26 on the boiler and cylinder respectively, cooperates with the pipe 7 to form a rigid support for the cylinder.

Although I have shown and described one embodiment of the invention it is to be un derstood that I am not to be limited to the specific arrangement and construction of parts since various changes may be made, within the scope of the appended claims without departing from the spirit or sacrificing any of the advantages of the invention.

What I claim as new is:

1. A combined steam gage and safety valve comprising a cylinder adapted for connection to a steam boiler and having an outlet opening, a piston in the cylinder and arranged to control the passage through said outlet opening, a gage including an indicator hand connected to said piston, a spring connected to the piston, and means for varying the tension of the spring.

2. In a device of the class described, the combination of a cylinder, a piston arranged in the cylinder, a spring connected to the piston, and means for varying the tension of the spring and including a skeleton head screwed into the cylinder and connected to the spring.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN NAPOLEON ANGELL.

WVitnesses:

ETTA M. OAVENAUGH, FREDK, JOHNS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

